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Reply To: ECG

Liz Bode

Replying to Francois Ravier 04/12/2021 - 13:19

Hi Francois,

Sorry again for not getting back to you sooner.

I thought I had replied in more detail to Emma, but some of my explanation is missing!

If we look at lead II there is a P for almost every QRS (apart from the wide and bizarre looking complex that does have a P wave at the very start but the P runs in to the QRS so they are not related to each other, if that makes sense!). Therefore this is a sinus rhythm. The P wave is normal. There is no R wave in lead II (an R wave is always a positive deflection) and there is an S wave only. Then from the S wave the trace doesn’t return to baseline until after the end of the T wave. There is marked ST elevation here, which is a sign of hypoxia/ ischaemia. This cat, I think, had infarcted almost all of the free wall of the LV. He survived for about 2 months 🙁

Happy New Year to you,